MVC中路由器程序

MVC中路由器程序编写方式如下例子

把地址：/home/add?id=1
改写成：/home/add/1

把地址：/home/edit?id=1&sid=2
改写成：/home/edit/1_2

public static void RegisterRoutes(RouteCollection routes)
{
    routes.IgnoreRoute("{resource}.axd/{*pathInfo}"); 

    routes.MapRoute(
        name: "Default1",
        url: "{controller}/{action}/{id}",
        defaults: new { controller = "Home", action = "add" }
    );

    routes.MapRoute(
        name: "Default2",
        url: "{controller}/{action}/{id}_{sid}",
        defaults: new { controller = "Home", action = "edit" }
    );

    routes.MapRoute(
        name: "Default",
        url: "{controller}/{action}/{id}",
        defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
    );
}

那么控制器里接受参数应该这么写

public ActionResult add(int id)
 {
     int a=id;
     return View();
}

public ActionResult edit(int id,int sid)
 {
     int a=id;
     int b=sid;
     return View();
}